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Altairia
Taxonomy
Altairia was named by Blake and Reid (1998) [Sepkoski's age data: K Albi-m Sepkoski's reference number: 1265]. It is not extant.
It was assigned to Valvatida by Sepkoski (2002); and to Ophidiasteridae by Blake and Reid (1998) and Gale (2011).
It was assigned to Valvatida by Sepkoski (2002); and to Ophidiasteridae by Blake and Reid (1998) and Gale (2011).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1998 | Altairia Blake and Reid p. 523 |
| 2002 | Altairia Sepkoski |
| 2011 | Altairia Gale p. 60 |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| D. B. Blake and R. Reid 1998 | Distinguished by interbrachial marginals slightly enlarged, approximately square in outline with enlarged marginal granule depressions lacking or nearly so; interbrachial series lacking, smaller ossicle not intercalated between large carinals. Ophidiasterid close to those of Ferdinia-group sensu Marsh and Campbell (1991). Arms, disk somewhat flattened (rather than columnar), a shape suggestive of that of goniasterids. Ossicles of primary series in well-defined longitudinal row with no scattered enlarged primary ossicles. Arm types, marginal, abactinal series clearly defined. Carinal row well defined; two lateral rows proximally, one row terminating at mid-arm. Marginals larger than abactinals, actinals; marginal rows without intercalated ossicles; inferomarginals larger proximally but ossicles of two series becoming approximately equisized distally. Ventral interbrachial areas large, with multiple ossicular rows. Furrow adambulacral spines flattened, elongate; six or more in palmate arrangement on each ossicles; subambulacral spines more robust than those of furrow series, flattened; granular tissue covering lacking. |
Measurements
No measurements are available
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| Source: f = family, c = class, p = phylum | |||||
| References: Blake 1990, Aberhan et al. 2004, Aberhan 1992 | |||||
Age range: Late/Upper Albian or 105.30000 to 99.60000 Ma
Collections (3 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Albian | USA (Texas) | A. wintoni (59871 59875 59878) |